54 lines
1.2 KiB
Elixir
54 lines
1.2 KiB
Elixir
defmodule EventosWeb.HTTPSignaturePlug do
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@moduledoc """
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# HTTPSignaturePlug
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Plug to check HTTP Signatures on every incoming request
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"""
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alias Eventos.Service.HTTPSignatures
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import Plug.Conn
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require Logger
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def init(options) do
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options
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end
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def call(%{assigns: %{valid_signature: true}} = conn, _opts) do
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conn
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end
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def call(conn, _opts) do
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user = conn.params["actor"]
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Logger.debug(fn ->
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"Checking sig for #{user}"
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end)
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with [signature | _] <- get_req_header(conn, "signature") do
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cond do
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signature && String.contains?(signature, user) ->
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conn =
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conn
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|> put_req_header(
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"(request-target)",
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String.downcase("#{conn.method}") <> " #{conn.request_path}"
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)
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assign(conn, :valid_signature, HTTPSignatures.validate_conn(conn))
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signature ->
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Logger.debug("Signature not from actor")
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assign(conn, :valid_signature, false)
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true ->
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Logger.debug("No signature header!")
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conn
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end
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else
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_ ->
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Logger.debug("No signature header!")
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conn
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end
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end
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end
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